You can't always judge a book by its cover! I ride with some Harley guys and they're normal, responsible citizens. They just look bad-ass - especially riding in a pack.
I just clocked 50 on my age odometer. You think people are surprised you're not 20-something because you ride a "crotch rocket"? You should see the surprised looks I get when I get off my green Ninja and take off my matching green gear ;-)